7318645 has 8 divisors (see below), whose sum is σ = 8815320. Its totient is φ = 5832960.

The previous prime is 7318631. The next prime is 7318681. The reversal of 7318645 is 5468137.

It can be written as a sum of positive squares in 4 ways, for example, as 3290596 + 4028049 = 1814^2 + 2007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7318645 - 2⁵ = 7318613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7318645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1200 + ... + 4009.

It is an arithmetic number, because the mean of its divisors is an integer number (1101915).

Almost surely, 2^7318645 is an apocalyptic number.

It is an amenable number.

7318645 is a deficient number, since it is larger than the sum of its proper divisors (1496675).

7318645 is a wasteful number, since it uses less digits than its factorization.

7318645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5495.

The product of its digits is 20160, while the sum is 34.

The square root of 7318645 is about 2705.2994288988. The cubic root of 7318645 is about 194.1527563658.

The spelling of 7318645 in words is "seven million, three hundred eighteen thousand, six hundred forty-five".